I've been running a Static Study on an assembly with two orthotropic parts and one isotropic part. The study got to 100% relatively quickly but seems to be looping on the task "1ding". It gets to ~60% and works for a long while before going back to 0% and working back up to 60%. It has done this on a few separate attempts with this assembly. Also, the memory keeps growing and contracting like something is actually happening, so I keep thinking it will wrap things up.